Best usage-based billing software for API companies

API companies can face high-volume, bursty usage streams that must be translated into accurate, transparent invoices. Billing platforms differ materially in event ingestion, aggregation flexibility, rerating, retention of raw usage events, dimensional pricing, and pricing-change workflows. Those differences matter as usage-based and hybrid models become more central to product monetization. A January 2025 survey by Metronome and Greyhound Capital found that 85% of 100 surveyed SaaS companies had adopted usage-based pricing, making the choice of a usage-based billing engine an increasingly important infrastructure decision.

The stakes extend beyond back-office operations. In a Stripe survey of more than 2,000 global business leaders, 38% of respondents said their companies had lost deals because of inflexible billing systems. For API companies, billing infrastructure affects revenue capture, pricing agility, customer trust, engineering capacity, and finance operations. This guide examines seven usage-based billing platforms through the lens of API company requirements, including event ingestion, flexible pricing models, developer workflows, pricing iteration, and financial operations.

Key takeaways

• Usage architecture matters at scale: Relevant differences include event ingestion, aggregation flexibility, retention of raw usage events, rerating, backfills, and pricing-change workflows.
• SQL-based metrics expand pricing flexibility: Query-based metric definitions can support averages, maximums, minimums, filtered usage, and custom calculations beyond simple event counts.
• Backfills and backdating support accurate corrections: Late usage, contract amendments, and billing corrections can require retrospective recalculation. Historical raw usage events provide a durable basis for rerating and auditability.
• Dimensional pricing supports multi-variable billing: API and infrastructure companies may price across dimensions such as region, instance type, service type, model, and environment without creating a separate pricing construct for every combination.
• Pricing execution is cross-functional: Product, engineering, finance, RevOps, and sales all depend on the same pricing and billing logic. A unified system can reduce the operational fragmentation that otherwise appears as manual reconciliation, engineering bottlenecks, or confusing customer bills.
• Financial workflows depend on auditable billing data: Enterprise billing systems need to produce traceable accounting data and support revenue-recognition workflows. ERP integrations can reduce reconciliation and close-management effort, although the integration itself is not a requirement of accounting standards such as ASC 606.

1. Orb

Orb is a revenue design platform purpose-built for usage-based and hybrid billing, including API, AI, and infrastructure use cases. It combines metering, pricing, billing, invoicing, accounts receivable, and revenue reporting around the same usage and commercial data.

Key capabilities for API companies

• Scaled event ingestion: Orb supports event ingestion via API and S3 at volumes such as 250K+ events per second, with idempotency and built-in event processing. For higher-volume workloads, Hosted Rollups support continuous ingestion of billions of events per day.
• SQL-based metrics: Teams can define billable metrics with Custom SQL, including billing-period averages, maximums, minimums, filters, and other queryable calculations beyond simple event counts.
• Dimensional price groups: Orb’s dimensional price groups support pricing across multiple usage dimensions, such as region, instance type, and environment, using a single pricing configuration for dimension combinations. See dimensional pricing.
• Plan versioning: Pricing versions can be created and managed, with versions and migrations supporting scheduled or bulk subscription migrations without bespoke migration scripts for many pricing changes.
• Complete audit trails: Orb tracks pricing changes and customer amendments through a billing audit trail with timestamps and attribution for audit and analysis.
• Simulations: Orb Simulations can test pricing changes against real historical usage data before production rollout, including customer-level and revenue impact analysis.

Why API companies choose Orb

Orb's query-based architecture persists granular raw usage events rather than relying only on pre-aggregated counters. Its metering architecture can surface individual event logs and supports backdating, while Hosted Rollups provide streaming aggregation for workloads that benefit from rollups during ingestion.

That architecture gives pricing, product, engineering, and finance teams a shared source of truth. Accuracy workflows support retroactive price changes, backdated adjustments, and event corrections. Before invoice finalization, affected charges can recalculate automatically. If an invoice has already been issued, Orb can void it or issue a credit note, then backfill missing usage or apply retroactive pricing and recalculate affected invoices. The adjustment history remains available for auditability. For API companies dealing with late contract changes, infrastructure incidents, or billing corrections, this can reduce revenue leakage and manual reconciliation while preserving a clear link from usage to billable amounts.

Orb also treats pricing as an execution layer rather than a static configuration. Product and finance teams can model what-if scenarios in Simulations, then use versioning and migration workflows to roll approved changes into production. This supports the broader revenue design motion of automating billing, executing pricing changes, and using granular usage data to inform monetization decisions.

Adyen completed its acquisition of Orb on July 1, 2026. Orb continues to operate as a stand-alone product, and customers can continue using their preferred payment-processing partner.

Customer results

• Vercel customer story: Vercel decreased the time required to build and launch billing for new products by 80%.
• Stytch customer story: Stytch reduced time spent processing bills and invoicing by 75%.
• Orb's B2B SaaS guide: Orb reports that Replit has seen 40x revenue growth since using Orb to monetize usage.
• Orb customer stories: Supabase processes 1.5M invoices per month through Orb.

The bottom line

For API companies that need usage billing, pricing iteration, and finance workflows in one platform, Orb provides a comprehensive foundation for revenue design. SQL-based metrics, dimensional pricing, persistence of raw usage events, simulations, backfills, versioned pricing, and high-volume rollup options support both day-to-day billing accuracy and ongoing monetization change.

Pricing: Orb pricing is custom and based primarily on billings and events. Advanced and Enterprise tiers also include a platform fee. An interactive demo is available.

2. Metronome

Metronome is a usage-based billing platform for infrastructure and AI workloads. It supports usage metering, enterprise contract structures, customer usage visibility, and data exports.

Primary focus

• Usage metering: Supports event ingestion with idempotency, retry, backfill, and recovery mechanisms.
• Enterprise contracts: Supports commitments, credits, overages, and custom rate cards.
• Data warehouse integration: Supports data exports to Snowflake, BigQuery, and Redshift.
• Usage insights: Supports customer-facing dashboards for usage, spend, and commitments.
• Contract management: Supports enterprise commitment structures and negotiated commercial terms.

Organizational fit

Metronome serves AI, infrastructure, and software companies with usage-based billing requirements and enterprise contract complexity. Stripe completed its acquisition of Metronome on January 14, 2026, so Metronome now operates within the Stripe ecosystem. That positioning can align with organizations that already use Stripe and want usage billing capabilities within the same broader payments environment.

Notable Metronome customers include OpenAI, Databricks, and Confluent. In a platform comparison, Orb provides an alternative centered on query-based billing over raw usage events, pricing simulations, pricing-change workflows, invoicing, AR, and finance-oriented billing operations in the same system.

Pricing: Metronome's Startup pricing is 0.8% of billing volume plus $0.04 per 1,000 ingested events. The Custom tier uses tailored pricing.

3. Stripe Billing

Stripe Billing provides subscription and usage-based billing capabilities as part of Stripe's broader payments infrastructure. For teams already using Stripe Payments, it provides a billing path within the same ecosystem. Stripe Billing and Metronome are evaluated separately here because basic usage-based billing features remain available through Stripe's Meters API as part of Billing pricing, while Metronome is Stripe's separate usage-based billing product.

Primary focus

• Metered billing API: Supports usage metrics such as API calls, storage, or seats for billing.
• Integrated payments: Connects billing to Stripe's payment processing infrastructure.
• Smart dunning: Supports automated retry workflows for failed payments.
• Tax automation: Integrates with Stripe Tax for tax calculation.
• Developer tooling: Provides APIs, documentation, and SDKs across the Stripe ecosystem.

Organizational fit

Stripe Billing can fit startups and growth-stage companies already operating in the Stripe ecosystem, including businesses with recurring subscriptions and metered components. Stripe's current product structure includes the Meters API for basic usage-based billing in Billing, with Metronome offered separately for usage-based billing.

For API companies whose monetization expands into multi-metric usage, pricing simulations, backfills, dimensional pricing, or cross-functional billing and finance workflows, Orb provides a usage-native system centered on raw usage events and pricing execution.

Pricing: Stripe Billing is available at 0.7% of billing volume or through annual subscriptions paid monthly at $620, $1,500, $2,950, or $5,750 per month. The Meters API includes up to 100 million events per month. Metronome is separately priced.

4. Lago

Lago is an open-source billing platform for usage-based, subscription, prepaid, and hybrid pricing. Its open-source core can be self-hosted, while Lago Premium is available in cloud and self-hosted deployment models.

Primary focus

• Open-source core: AGPLv3-licensed and available for self-hosting.
• Event-based billing: Supports event ingestion and usage aggregation.
• Flexible pricing models: Supports tiered, graduated, volume, package, subscription, and hybrid pricing structures.
• Prepaid credits: Supports credit wallet functionality for prepaid scenarios.
• API-first design: Provides REST APIs, SDKs, and webhooks for integration.

Organizational fit

Lago can fit developer-led organizations where open-source software, self-hosting, deployment control, or data-sovereignty requirements are central to the billing architecture. Its managed and self-hosted options provide flexibility in how the billing system is operated.

Orb takes a different approach by providing a managed revenue design platform with persistence of raw usage events, SQL-based pricing logic, simulations, versioned pricing migrations, invoicing, AR, and finance workflows in one system.

Pricing: Lago's open-source core is free to self-host. Lago Premium is available through cloud or self-hosted deployment with tailored pricing.

5. Chargebee

Chargebee is a subscription management and monetization platform with usage-based billing capabilities. It combines subscription lifecycle automation, usage ingestion, pricing, invoicing, and related finance workflows.

Primary focus

• Hybrid billing: Supports subscription and usage charges on the same customer relationship.
• Multi-currency support: Supports billing in more than 120 currencies and exchange-rate updates for reporting.
• Payment gateway integrations: Supports more than 40 payment gateways.
• Revenue recognition: Chargebee RevRec supports revenue-recognition workflows under ASC 606 and IFRS 15.
• Dunning management: Supports automated workflows for failed payments.
• Usage metering: Supports raw usage events, schemaless usage data, aggregation, and custom SQL configurations for metered features.

Organizational fit

Chargebee serves companies with subscription, usage-based, and hybrid pricing models. Its current usage stack supports ingestion of raw usage events, custom SQL metering, included usage, usage thresholds, and multiple usage pricing configurations alongside a broader subscription management suite.

For API companies prioritizing a system built around raw usage events, pricing simulations, backfills, dimensional pricing, and pricing execution across product and finance teams, Orb offers a revenue design approach centered on those workflows.

Pricing: Chargebee Billing's Flow plan is currently offered at $0 plus 0.80% of monthly invoicing volume, or $99 plus 0.65%, with 100 million usage events per month included. Enterprise pricing is custom, and RevRec pricing is separate.

6. Maxio

Maxio, formed from the combination of Chargify and SaaSOptics, connects billing operations with financial management for B2B SaaS companies.

Primary focus

• Unified billing and finance: Connects billing with revenue-recognition and finance workflows.
• Revenue recognition: Supports ASC 606 and IFRS 15 revenue-recognition workflows.
• SaaS metrics: Provides reporting for ARR, MRR, churn, and cohort analysis.
• Contract management: Supports B2B contract and subscription structures.
• ERP integration: Connects billing and accounting workflows with financial systems.
• Usage monetization: Supports multidimensional metering, composite billing expressions, hybrid pricing, pricing experiments, and product versioning.

Organizational fit

Maxio serves B2B SaaS organizations that combine billing, revenue recognition, reporting, and usage monetization requirements. Its current product set includes metering and rating capabilities alongside subscription and finance workflows.

Orb provides an alternative centered on raw usage events, Custom SQL metrics, simulations on historical usage, dimensional price groups, backfills, and coordinated pricing migrations across a usage-native billing core.

Pricing: Maxio Grow starts at $599 per month. Maxio Scale uses quote-based pricing.

7. Zuora

Zuora is a monetization platform used by mid-market and enterprise organizations with recurring, usage-based, hybrid, global, or revenue-management requirements.

Primary focus

• Enterprise billing operations: Supports large billing workloads and multiple pricing models.
• Multi-entity support: Supports global operations with multiple legal entities and currencies.
• Usage rating: Supports mediation and rating for usage-based scenarios.
• Security and compliance: Maintains programs and certifications including SOC 2 Type II, PCI DSS Level 1, and ISO 27001.
• Order-to-revenue workflows: Supports billing and revenue processes across enterprise sales motions.

Organizational fit

Zuora serves organizations with established subscription, usage, revenue, and global billing requirements. Its platform spans billing and related quote-to-cash and revenue workflows, and its packaging varies with product modules, transaction volume, business model, regions, and implementation scope.

For API companies emphasizing raw usage events, SQL-defined billing metrics, simulations, backfills, and pricing iteration, Orb provides a usage-native revenue design platform that keeps pricing execution and billing operations closely connected.

Pricing: Zuora pricing depends on products, scope, transaction volume, business model, regions, and implementation needs.

Why Orb stands out for API companies

For API companies, billing complexity is rarely confined to invoice generation. Usage data, product packaging, negotiated terms, pricing changes, finance operations, and customer explanations all depend on a common billing model. Orb is designed to make that model a shared operating layer across engineering, product, sales, RevOps, and finance.

Architecture designed for usage

Billing platforms differ in event ingestion, aggregation flexibility, rerating, retention of raw usage events, dimensional pricing, and pricing-change workflows. Orb's standard query-based architecture stores granular raw usage events for auditability and retrospective corrections. For extreme-volume workloads, Hosted Rollups aggregate configured event streams during ingestion while preserving a billing architecture designed for usage-based monetization.

This approach supports a durable link from product activity to billable metrics and invoices. When usage arrives late, a contract is amended, or billing logic changes, Orb can use the underlying raw usage events and billing definitions to recompute eligible billing and apply accounting-preserving corrections where required.

Pricing iteration without engineering bottlenecks

API companies often evolve pricing as products, customer segments, and enterprise contracts change. Orb Simulations lets product and finance teams model pricing changes against real usage data before deployment. Pricing migrations can then move subscriptions to new versions through managed workflows.

That combination reduces the need to encode every pricing change in product code. It also gives teams a more controlled path from pricing idea to modeled impact to production execution, while retaining legacy pricing where required.

Financial workflows and ERP integration

Enterprise API companies need billing systems that produce auditable accounting data and support revenue-recognition workflows. Native ERP integrations can reduce reconciliation and close-management effort. Orb's NetSuite integration creates standard transaction objects such as invoices, credit memos, and customer deposits, giving finance teams structured billing data for reconciliation and audit workflows. Orb also maintains security and compliance programs including SOC 1 and SOC 2 Type II certifications.

A shared system for revenue design

The operational advantage of a usage-native platform extends beyond billing accuracy. When raw usage events, pricing definitions, billing calculations, invoice data, and revenue reporting live in one system, teams can work from a common source of truth. Engineering spends less time maintaining bespoke billing logic, product can iterate pricing with clearer impact analysis, finance can trace billed amounts back to usage, and customer-facing teams can explain charges with greater confidence.

This is the broader revenue design model: automate billing, execute pricing changes, and use granular usage data to inform revenue growth on top of the same billing foundation.

Proven customer outcomes

The results are concrete. Vercel customer story reports an 80% decrease in the time required to build and launch billing for new products. Stytch customer story reports a 75% reduction in time spent processing bills and invoicing. Orb's B2B SaaS guide reports 40x revenue growth since using Orb to monetize usage.

For API companies seeking a billing platform that can scale with event volume, support evolving pricing models, and connect product monetization with finance workflows, Orb provides a comprehensive revenue design platform built around those requirements.

Frequently asked questions

What is usage-based billing and why is it important for API companies?

Usage-based billing charges customers based on actual consumption, such as API calls, compute time, tokens, storage, or data processed. For API companies, this model can align spend more closely with consumption, lower the initial purchasing barrier, and create expansion revenue as customer usage grows. The core operational challenge is accurately metering usage and translating it into transparent, contract-aligned invoices.

How does usage-based billing software handle complex pricing models like dimensional pricing?

Platforms can group usage across dimensions and apply different pricing logic to those groups. Orb's dimensional pricing supports pricing across multiple usage dimensions, such as region, instance type, and environment, using a single pricing configuration for dimension combinations. This is useful for API and infrastructure companies whose costs or value metrics vary across multiple attributes.

Can usage-based billing platforms integrate with financial systems like NetSuite?

Yes. Some billing platforms provide native ERP integrations. Orb's NetSuite integration creates standard transaction objects such as invoices, credit memos, and customer deposits, giving finance teams structured data for reconciliation, close, and audit workflows.

What are the benefits of a dedicated billing engine compared with building API monetization in-house?

Internal billing systems can begin as a focused engineering project, but usage models, enterprise contracts, credits, backfills, pricing changes, and finance requirements add permanent operational scope over time. A dedicated billing platform can move metering, pricing logic, invoicing, corrections, auditability, and finance integrations into a purpose-built system. In Orb's Vercel customer story, Vercel reported an 80% reduction in the time required to build and launch billing for new products.

How does a usage-first platform differ from a subscription platform with usage features?

The difference is primarily architectural and operational rather than categorical. Relevant dimensions include how the platform handles raw usage events, metric definitions, rerating, backfills, dimensional pricing, contract changes, historical simulations, invoice-state changes, and finance workflows. A usage-first platform like Orb is built around frequent usage and pricing change as a core operating model, while broader subscription platforms combine usage capabilities with established recurring billing workflows.